Serena Williams! I cannot begin to tell you how happy it makes me to see one of the Williams sisters on the cover. Serena is fierce competitor who has overcome illness and injuries that laid her out for over two years to become the number-one world ranking tennis champion.

The secret to her success is pretty simple—she uses of her on-court personae. The Serena that plays tennis is tough, single-minded, focused and in her own words “just not nice.” Which she says is about three hours of her day. The rest of the time she is a self-described “class clown” who enjoys karaoke, silly pranks and is eager to learn Korean in time for the next Summer Olympic games.

Best thing I learned in this interview—one of Serena’s favorite songs is Maneater by Hall & Oats. How great is that?